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25.20 The insulated conductors of the supply cord for type Y attachment and type Z
" _- k( t: Y& Y" l$ R) Vattachment shall be additionally insulated from accessible metal parts by basic insulation3 U, H3 b( }( [) R9 P9 q
for class 0 appliances, class 0I appliances and class I appliances, and by supplementary. D/ E7 S/ ?* k- C" D* l) {
insulation for class II appliances. This insulation may be provided by the sheath of the+ b" c. V# ~2 M* q8 q9 b
supply cord or by other means.
$ }8 C# f5 O2 S" ~! yCompliance is checked by inspection and by the relevant tests.8 w% z/ d% u# h2 H# N
各位师兄,我对这点一直很疑惑,大家能发表下自己的理解吗?我的理解是如下:
. E; q0 C/ ]3 D; g5 ]" K# M+ P/ [随便举个例子(烤箱),电源线进去不是有一段剥掉外表皮的一截线吗?那个就应该是insulated conductors of the supply cord,不知道我理解的对吗?如果是这样的话,那剥掉外皮的那段就不能碰到接地金属外壳了(class I), 而需要再加一层基本绝缘才能符合上面所说?请问大家我理解的对吗?1 W- g+ e+ V" W5 A+ Y+ _
如果是这样的话,我又有个疑惑:既然剥掉外皮的电源线不能接触接地的外壳,那我们一般所指的internal wire怎么就可以直接接触带接地的外壳呢?& d7 Q- g" G1 D; l
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